Men with erectile dysfunction and impotence can be treated with purple viagra. This medication aids in boosting blood flow to a man's penile region's tissues. sildenafil, the active ingredient in this medication, aids men in achieving powerful erections during intercourse. Men who are older than eighteen are the only ones who use this substance. Take this medication half an hour before having any sexual relations. This medication can be taken with or without food. This medication takes 24 hours to become effective. Take this medication as prescribed by your physician. Men over the age of 18 should be the only users of this medication.